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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 380 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.3/4 − 1/7 =
  2. 2.3/10 − 1/5 =
  3. 3.3/4 − 3/5 =
  4. 4.3/8 − 1/4 =
  5. 5.Kabir has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.8/9 − 5/6 =
  7. 7.Meera has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  8. 8.5/8 − 1/2 =
  9. 9.2/3 − 1/10 =
  10. 10.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.4/5 − 1/4 =
  12. 12.2/3 − 2/5 =
  13. 13.4/5 − 2/3 =
  14. 14.A bottle has 1/4 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.1/4 − 1/5 =
  16. 16.1/3 − 1/10 =
  17. 17.4/7 − 1/4 =
  18. 18.1/5 − 1/6 =
  19. 19.9/10 − 1/5 =
  20. 20.3/4 − 2/3 =
  21. 21.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/3 − 5/8 =
  23. 23.4/5 − 1/6 =
  24. 24.A bottle has 1/3 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 1/4 =
  26. 26.A bottle has 7/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  27. 27.5/6 − 1/10 =
  28. 28.Diya has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  29. 29.2/9 − 1/6 =
  30. 30.3/10 − 1/4 =
  31. 31.3/7 − 1/4 =
  32. 32.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/9 − 1/3 =
  34. 34.Ishaan has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 1/2 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  36. 36.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 1/3 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  38. 38.9/10 − 1/3 =
  39. 39.3/4 − 4/7 =
  40. 40.1/2 − 1/10 =

Answer key

  1. 17/28
  2. 1/10
  3. 3/20
  4. 1/8
  5. 7/18
  6. 1/18
  7. 5/24
  8. 1/8
  9. 17/30
  10. 5/24
  11. 11/20
  12. 4/15
  13. 2/15
  14. 1/12
  15. 1/20
  16. 7/30
  17. 9/28
  18. 1/30
  19. 7/10
  20. 1/12
  21. 11/15
  22. 1/24
  23. 19/30
  24. 4/21
  25. 13/20
  26. 4/9
  27. 11/15
  28. 17/30
  29. 1/18
  30. 1/20
  31. 5/28
  32. 5/9
  33. 2/9
  34. 11/30
  35. 1/4
  36. 1/10
  37. 2/15
  38. 17/30
  39. 5/28
  40. 2/5

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